Title :
Robust dual-wavelength ring-laser based on two spectrally different erbium-doped fiber amplifiers
Author :
Nilsson, J. ; Lee, Y.W. ; Kim, S.J.
Author_Institution :
Opto-Device Lab., Samsung Adv. Inst. of Technol., Suwon, South Korea
Abstract :
The authors demonstrate simultaneous lasing at two wavelengths in a fiber ring-laser containing two erbium-doped fiber amplifiers with different spectral characteristics. The lasing wavelengths were selected by a filter combination. For certain wavelength pairs, the ring co-lased even if the loss at one wavelength increased by 8 dB relative to the loss at the other one, while a 1-dB change was enough to prevent co-lasing in a ring with two similar amplifiers. The increased robustness-to-loss variations is a consequence of the overall spectral gain inhomogeneity that results from combining two amplifiers with different gain spectra. The concept is also applicable to dual-wavelength transmission.
Keywords :
erbium; fibre lasers; laser accessories; laser beams; laser cavity resonators; optical fibre losses; ring lasers; 8 dB; Er-doped fiber amplifiers; co-lasing; dual-wavelength ring-laser; dual-wavelength transmission; fiber ring-laser; filter combination; gain spectra; lasing wavelengths; loss; robustness-to-loss variations; simultaneous lasing; spectral characteristics; spectral gain inhomogeneity; wavelength pairs; Band pass filters; Erbium-doped fiber amplifier; Laboratories; Optical attenuators; Optical filters; Research and development; Ring lasers; Robustness; Spectral analysis;
Journal_Title :
Photonics Technology Letters, IEEE